22188166 has 32 divisors (see below), whose sum is σ = 44690688. Its totient is φ = 7979040.

The previous prime is 22188163. The next prime is 22188167. The reversal of 22188166 is 66188122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22188163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3540 + ... + 7543.

It is an arithmetic number, because the mean of its divisors is an integer number (1396584).

Almost surely, 2^22188166 is an apocalyptic number.

22188166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

22188166 is an abundant number, since it is smaller than the sum of its proper divisors (22502522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22188166 is a wasteful number, since it uses less digits than its factorization.

22188166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11116.

The product of its digits is 9216, while the sum is 34.

The square root of 22188166 is about 4710.4316150434. The cubic root of 22188166 is about 281.0005276857. Note that the first 3 decimals are identical.

The spelling of 22188166 in words is "twenty-two million, one hundred eighty-eight thousand, one hundred sixty-six".